Update src/expressions/operator-expr.md

Author: CAD97

src/expressions/operator-expr.md

@@ -406,7 +406,6 @@ To illustrate:
 ```rust
 use std::ptr;
 
-```
 let u8_slice_ptr = ptr::slice_from_raw_parts::<u8>(ptr::null(), 4);
 assert_eq!((ptr::null(), 4), u8_slice_ptr.to_raw_parts());